Expansion-joint.



F. H. RICHARDS.

EXPANSION JOINT.

APPLICATION FILED AUG.4. I9l6. RENEWED mus 15. 1918.

Patented J an. 21, 1919.

3 SHEETS-SHEET! wk wk Inventor: I

'F. H. RICHARDS.

EXPANSION JOINT. APPLICATION FILED AUGJ, I916. RENEWED JUNE I5- 3 SHEETS-SHEET 2.

Patented Jan. 21, 1919.

,qeo.

F. H. RICHARDS.

EXPANSION JOINT.

APPLICATION FILED AUG.4. !91 6. RENEWED JUNE 15- I9I8.

a I .l w .r. Y 7 mm Jim E d I es t3 n m DL UNITED SIATEFF'SFPATENT OFFICE.

rmmois H. RICHARDS, or HARTFORD, CONNECTICUT. ASSIGN BUFFALO, NEW YORK.

Application filed August 4, 1916, Serial No. 113.041.

' To all whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the Unitalstates, residing in Hartford, in the county of Hartford and State'of Connecticut, have invented certain new and useful Improvements in Expansion-Joints, of which the following is a specification.

, A principal object of my present invention is to furnish an expansion j'ointsuitable for use in ipe llnBS-fOI heating plants and for conveying water or other liquids in large quantities and of varying temperatures, and in which the packing maybe readily adjusted, as regards tightness or comression without the removal of any mom-.

ers of the apparatus.

A furtherobjeot is to provide a packing and compressing appliances therefor so arof Fig. 1.

ranged as not to require any guiding means other for supporting the pipe line in an approximately true position. Other. features of the improvement i'elate; to packing compress ing appliances so organized as to be removable from and replaceable in working position without requiring any part or pipelength of the pipe line to be disconnected, nor any section of the line to be removed.

A further feature relates to a means and constructionwhereby a relatively thin bras linin ma be a )lied in the )aekin b D cylinder in such a. manner as to secure a high degree of accuracy and eiliciency while requiring a minimum amount of the more expensive metal, and at the same time pro- 'vide for readily repairing and renewing the lining whenever required.

In the drawin s accom Jan hr and forming apart of this specification, Figure 1 is aside elevation, drawn largely in section, for illustrating the principal features of my present invention in one of the more simple arrangements thereof.

Fig. 1*.illusi rates a modified arrangement as hereinafter more fully explained.

Fig. 2 is a cross sectional view in line 22 showing the parts at the right hand of said line as seen from a point at the left hand thereof.

Fig. 3 1s a cross sectional view in line EXPANSION-JOINT.

Specification of Letters Patent.

than such as ordinarily used v form of the packing illustrative of one packing without disassembling the principal R TO SCOTT C. ROSS, OI

Patented Jan. 21, 1919, Renewed June 15, 1918. Serial No. 240,249.

3.-3 of Fig. 1, showing the parts at-the left hand of said line as seen from a point at the right hand thereof.

F ig. 4 is a view similar to Fig. 1 and illustrates a more complete embodiment of the present improvements.

Fig. 5 1s a. cross sectional view on line 5-5 of Fig. 4, for showing the parts immediately at the left of said line as seen from a point at the; right hand thereof.

Fig. 6 is a view similar to a portion of Fig. 4 for further illustrating the packing device or mechanism. 4

Fig. 7 is a. cross Sectional view in line 77 of Fig. 6, and shows the parts at the left. hand of said line as seen from a point at the right hand thereof.

Fig. 8 is a sectional view in line 8-8 of Fig. 6, for-showing the parts between said lines and 8-.8 as seen from a point at the left hand of said line 88.

Fig. 9 is a side elevation similar to Figs. 1 and 1-, and showing the guide cylinder in longitudinal section and also showing the packing-earrying end of the coacting pipe line member broken away along the side portions thereof for more clearly illustrating certain details which are hereinafter more fully explained.

Fig. 9 is a cross section taken on the line 9, Fig. 9, for showing the details immediatelv at the righthand of said line 9.

' Fig. 9" is a fragmentary view corresponding to a portion of Fig. 9,and is illustrative of certain details and featuresof a preferred compressin means when this is arranged for removal liy a dis assembling the same.

Fig. 10 is a. side view corresponding to a portion of Fig. 9, for further illustrating the preferred means for holding, compressing and removing the packing.

Fig. 10 is a cross section of line 10 of Fig. 10, and shows the parts at the right hand of said line as seen from a point at, the left hand thereof.

Fig. 11 is a fragmentary sectional view corresponding to a portion of'Fig. 9, and is Way of removing the pipe-line members;

Fig. 12 1s a plan view and Fig. 12". a-

J is

I longitudinal section of one of the seriesofj which are further the several 1. 2, 4, and 6, as beingbolted,-as by anchorage bolts t,

.- In Fig. 1, a series .for the purpose in to withdraw the packing-compressing ap' packing extractor devices,

illustrated in Figs. 9 to 11.

Similar characters designate all of the views.

like parts in of pipe-line members pipe lengths, are indicated by I, D and and the members I and D are shownhaving communication with each other through the cylinder B which for some art of its lengthis also a fluid conveyor.

n'Fig. 4, the same arrangement is shown with the additional feature that the pipeend D is extended by a length D this is of providing a space wherepliances,-which are arranged exteriorly of the member D,'-'to a position (not shown) entirely bevond the cylinder B. At its for ward end the tube D is shown formed or turned outwardly into a packing-rimd which is shown adapted and arranged to slide freely within the cylinder B the entire length thereof. Inpractice, the expansion joint should be so fitted up and adjusted that the rim 03 will 'not contact with the inner face of the piston-chamber Within the member B. The pipe-lengths D and D may be connected by flanges, as F, F, and by bolts,'in the well-known manner shown in Fig. 1. In this arrangement, the flange F also may serve as an abutment ring against which the prcsser-actuating screws, as g may act; these screws,0ne or more of them, as may be found desirable,-may be threaded into a flange,as Ft, Fig. l,-ot the compressor-member M. In Fig. is shown screwed onto the tube M, but'other modes and forms of attachment may used, also said flange and tube may be made integral, this being in accordance with the arrangements of details in Figs. 4 and 9. In arrangements described, it will be noted that the slidable pipe-line member,as D, Fig. l, and D, Figs. 4 and 9,- is shown to be unguided as'to alinement, for which purpose this member is made small enough so that a clear space is left between the several pressers and the interior surface of the cylinder lining E 1 The casing or cylinder B is shown in Figs.

I provided with abaseplate, 72 connected with the cylinder proper by means of the walls 7), b and the extensions f f (Figs. 1, 2 and 4:) of thesaid cylinder flange F. In practice, however, such supporting means may whenever the manner line does not require the same. When provided with the base 71 the cylinder B and said base and connecting parts constitute a comhinedzcylindcr and easing which is also a bracket or frame-member suitable for being ,'upon some substantial foundation, as indicated at but a variable 3 be somewhat elliptical, or

'herein employed,

of installing the'pipe .1,2 Q 2,060 I l w N,-for ihstance, which usually may be stone or concrete.

This construction and arrangement of the casing-member B provides for utilizing the entire length of this member for the interior rlzylinder-surface on which the packed-end of the slidable pipe-length, as D or D may slide. Thus the entire lengthof the interior of the member B constitutes a pistonchamber, iii-which said packed-end D slides after the manner of an engine piston'sliding in an ordinary engine cylinder;

the cylinder, but it should be understood that the interior surface need not be truly circular in section,-although usually more conveniently made, of that form,--but1 may even polygonal, in cross's ectional .outhne, and. still be a cylinder within the meaning of this term as since such a variatiorr ftnot shown) does not materially modify or change the mode of operation. v

The pipe line section P, shown at the right hand in Figs. 1 and 4, may be connected with the packing cylinder Bin any suitable or convenient manner. In the present inshown said pipe P provided" with the outwardl turned flange P which ma be clamped etween the two rings R and R for securing the of the joints. As one securing said lamp rings to the cylinder '13, ,this cylinder may be provided with a flange F, so that the holdingbolts, as H, H, may draw the outer ring R against the pipe flange p and thus draw the middle ring It required tightness I suitable means for hence, for 'eonvenlence this plston-chamber 1s termed against the outwardly turned end 6 of the the mode of operation of cylinder lining E; these various comparison of the several views in which the same are illustrated. In practice,

ever, the said middle ring R, in some in- -stances, may be omitted, and the pipe-flange F, (being made of suitable size therefor may be drawn against the lining flanges in a manner which will be obvious without details will be evident from a further description. This modification of diate ring-R of Figs. 1 and 4. Whenever;

found to be desirable, of course, a layer of sheet-form packing material of any suitable faces; of; the several aforesaid rings and flanges, miaccordance with an ordinary practice well-known in this art, and hence such layers, packing or materials are not shown in the drawings.

In practice, the cylinder B will usually be made of cast iron for low pressure and of cast steel for high pressure pipe-lines, and

should be bored for truly sizing the same 120. between the pairs of y y in-any particular instance, are to be trans mitted through the pipe-line. The lining tube being providedpf suitable size to slide into the cylinder B, and having been previously shaped or spun outwardly toform a holding flange, as c, this tube may then be expanded into the cylinder B in a wellknown manner b spinning or rolling the same with a suitalile tool, (not shown). In th'is'way, or in other suitable manner, the

lining-tube E, may be firmly seated or fitted within said cylin'der. After this is done, the lining-tube having been first made of suitable length therefor,the outer end (at the left-hand in Fig. 1), may be spun over at e to engage against the end of the cylin der B and thus form a smooth and bead-like corner. In some instances, however,and whenever desired,said end-finish at (2 may be omitted. Also, and preferably in many cases, said lining-tube may be fitted closely but freely within the eylinderB so that, being held -by its end flange c -clamped in [position as described,the said lining-tube will be free to slide within the cylinder B to the extent of the difference in longitudinal expansion, by changes in temperature, due to the kinds of metal of which said 11ning-tube and said cylinder B, respectlvely,

are made; this slidablearrangement of the lining-tnbe is deemed to be preferable whenever the expansion joint shall be constructed to provide for a relatively long movement 'or working stroke. An instance of this kind is found in heating plants where the,,-water is intermittently raised from a low temperature to unusually high tcn'iperatures, and especially when such pipe-lines are of a considrrable length between the expansion- ;io nts and the usual coacting anchorages.

The cylinder B, or the lining thereof, as i when this cylinder is provided with a lining tube, constitutes one part, or length,-' however short this may be,of the line of pipe itself, and therefore is one of the tubular lluid-(amveying components of the conill) of the means for connecting said tube-memher, as E, to the adjacent component, as I,- of the pipe-line. The construction here set forth has an exceptional utility in expansion joints, since the lining E maybe made ofdrawn metal which is thus given a smootlr 'surface, while the inside of the cylinder B 1, needs, in practice, to be merely trued up inthe machining operation, without requiring. to be made smooth enough for the packing rings to slide thereon; thus the said boring operation isgreatly reduced in cost; also,:

a pitting of the casting which would ordi f narily spoil the inner surface thereof, is now;, rendered of no effect, thus largely reduc-ygo ing the foundry costs and losses usual in, the manufacture of this class of expansion joints. y y K Pipe lines of the class for which my present improvements are especially applicable are .85 usually installed by lacing the expansion 7 joint thereof upon a suitable foundation,- diagrammatically indicated at N,-while thesuccessive sections, or lengths of the line are supported by one or more rollers in ace well-known manner. In Fig. 4 such a roller is indicated at 9, and is shown placed and i arranged for supporting the pipe-line sec-t: tion D. The roller 9 is shown supported i115 a usual manner upon a pin 9 mountedin-an ordinary support or roller-frame 9", which may be set upon some suitable bracket or foundation as 9, depending upon theloca-l' tion and arrangement of the pipe line. suitable packing, preferably in the usual form of rings, as S, moldable as usual by. t; compression, are placed contiguous to the rim (1", and for properly compressingsuch packing, and for regulatingsuchcom'pres-ll05 sion, an improved means therefor is provided, which I designate as the packingcompressor. One feature of this packingcompressor is the arrangement thercofin the form,in a general way,of a sleeve, asM, disposed.externally of the pipe-end D, and

arranged for the forward end theroof, as at m, to bear against the packing 8, while the length of the compressor is sufficient to bring the rearward end thereof always bei yond or outside ofthe cylinder In some instances this compressor sleeve may be-a plain tube, slipped over the tube Dbefore, the usual reaiwYjn-cfflMige or ring is fixed or s formed thereoin 'on in other cases, before the forward end, (1 is formed thereon. But I Ipret'er to make said comprcssorof a com- ,l osite eonstrnctionyso thatit comprisesga plurality of segments, or stave-like members which arepi'eferably of a duplicate. char- 12 aeter,a11d 0 arranged that the compressor on being'drawn out of thecylinder may be v readily removed by disassembling from the pipe-end D. A further feature relates to the construction and organization of the 1%?0 Upon the forward part of the pipe-endpiiwo I gether 50 and may be provided with. screws as g I I 65 of with teeth at g",

members in such a manner that these members may be removed and-replaced separately, andalso each be adjustable by some separately-operable means, 5 of which some preferred arrangements are herein illustrated and described.

In Figs. 1

' said compressor and 3, the packing-compression; 'M, is shown formed ofv a tube slidable outside of the pipe D, but in Figs. 4 and 5, this member, M, is shown divided into the two longitudinally disposed presser members, an, while in Figs. ,6 and 7, the said compressor member is divided into four similar segmental parts, or pressers,'m m,'m,- m. Thus the device M may be said to be made up or composed, in some instances, of a series of members 411., these being separately distinguished by exponents-figures as above indicated. Also, in some of the views, modified or specialforms of the members m, are

indicated bythe sition of prime and ouble-prime marks, as for instance,

and 10, respectively. In Figs. 4 and 5, the presser members m, m, are shown held assembled in roper position on the pipe member D, by means of airs of ordinary ears or flanges at m, m, with holding bolts as shown) so arranged as to allow; said two pressers to be separately actu-, ated by the screws 9 or such other wel known or suitable actuating means as may be ada ted for that purpose. In al of the principal views the presser members are shown extending outwardly 36 from the cylinder B to a length greater than the normal stroke in said cylinder of the packing rings S, so that the outer end ofsaid packing-regulating means will always be located outside of the cylinder and thus be 40 readily accessible whenever required and re gardlessof the degree of expansion to which the pipe line, as D D may have been sub; jected by heat. The actuating means whereby to operate the longitudinally disposed segmental resser members, as shown in Figs. 4 to merit-ring G which (as shown in Fig. 8) may consist 'of two parts g, 9 held toby'bolts g, in an ordinary manner, whereby to force the several presser members against the packing. In the sectional views Figs. 4 and 6 said abutment ring is shown provided upon the inner side thereas one means whereby to releasably locate said abutment member on the pi e- D with a suflicient adhesion or degree 0 engagement for preventing the resistance of the packing from forcing said abutment ring rearwardly on the pipe-line.

When occasion requires the rearward, or outer, ends of the said press-0r members may be retained in proper engagement with the pipe D by means of a light band as k, made in two parts and held together by bolts,

in Figs. 9

8 inclusive, comprises an abu't-,

in the manner which is shown in thc draw ings. In some cases said retaining band may be omitted especially when the set screws g", as in Fig. 4, are each made to'have the point thereof engage in a recess formed at g in the rearward end of the presser member. a

,When thepacking regulating or compres sor apparatus or device is arranged with a removable abutment ring as a portion thereof, (as shown for instance in Fig. 4), and when such an abutment ring, as is to be employed in the form of pipe line mechanism shown in Fig. 10, said abutment ring maybe located on the forward part of the tapering portion D, so that the tapered outer surface of said conical portion of the pipe line member will furnish a support for said ring whereby to resist the action of the operating. screws of the packing compressor and thereby positively prevent the abutment ring from being slid backwardly on the pipe line. When this arrangementis employed and they workman is about to remove the compressor segments, he will ordinarily first remove said by unclamping the same and abutment ring taking it 9, art in the usual manner of rea vices. In practice the actuating may be threaded through said removable ring, G, and thus press forwardly against the rearward end of the compressor segments (as indicated at 51'', Fig. 10); or, said screws in some cases may be reversel arranged add the thread thereof engage with a nut formed in the rearward and outwardlyturned endof the'compressor member, while the point of the screw bears against said abutment ring,

.movin or me. clam -collars and analogene screws, as gf, 5

as shown for instance at g, Fig. 10; this is also in accordance with the arrangement shown in Fig 1. I

In the more complete orm thereof illustrated in 9 to 12, the packing compressor apparatus is shown used in combination 1 with a packing extractor means whereby,oh removal of the several component members of 'said compresse -ethic packing may be forcibly dragged out from between the pipe-end D and t e inner surface of the cylinder liningE. Whilethis packing extractor may have, in practice, vari-' ous specific forms and-arrangements, I prefer to arrange the same in about the samemannershown in plan view in Fig. 10, and in lon tudinal or side view, in F g. 12. This pac 'ng 12o extractor may be described as consisting of a I over at k and provided with outwardly'ipro- 18o annular member, which prefformed in two or more segments, also it is preferably made of some metal not readily oxidizable. In Fig. 9, such a metal layer. h, is indicated in position between the pipe end D and the riof ackingmaterial 'S. 0n the right han sai extractor plate or device is shown turned relatively thin erably, may be jecting hooks, as h (Figs. 9, 10, 11 and 12) so arranged that when the packing material is forced forwardly (toward the righthand), such material will be'forced over and engage saidhooks, and bear against the outwardly turned rim or packing abutment d of said pipe end D. On the leftof the packing ring said extractor plate is shown formed with extensions, b which may be of a width and length suitable for lying within the longitudinal space '21 of the compressor segment m, as best shown in Figs. 9 and '9". One object of this arrangement is that on the removal of said compressor segment the projecting portion h of the extractor may be used as a handle by means of which to draw the extractor outwardly and thus drag out the packing material from within the cylinder B. To facilitate this purpose said stem'or handle portion maybe provided with means for engaging .the same, as for instance a hole formed therein at it, into which the hook of a bolt, as 9 (Fig. 11) may be engaged, the threaded'stem of the bolt beingslipped through thestud or ear d of the pipe end D, so that by screwing up a nut,shown on the said bolt,this bolt,

together with the extractor device, may be ,pulledbackwardly upon the pipe end D.

Thus the said'bolt g operates as a form of screw-jack whereby to apply great force to, the packing for startin the same out of its working position (Fig. 9) at the forward I end of the pipe line member D, to a retract-eel; position, as in Fig. 11; To facilitate this operation, the forward portion, (i (Fig. 11),

of the pipe end D, is shown formed somewhat tapering, so that when the packing S is being drawn out, it will become released from pressure in a direction diametrically of the pipe, and thus be more readily removed and replaced.

As a means for considerablyreducing the endwise pressure on the pipe-line, due to the difference-in internal diameter of the tube-end; D relatively to the lining tube E, advantage may be taken of the well-known principle, (an instance of which is found in the Venturi meter.), that in a long pipe in which a large volume of fluid is moving steadily, ashort length of the pipe may be considerably reduced in size without materially increasing the resistance to the forward flow of the fluid. Accordingly, in Fig. 9, the pipe-lengths P and D are-shown nearly as large in diameter as the lining lengths D and D should be joined (pref tube E, while the short pipe-length, or tubeend, D,is reduced to arelatively smaller size. Thus the cross-sectional area of the piston chamber within the member B,-which, of, course, determines the end pressure upon the pipe-D ,may be little if any morethan such area of the pipe-lengths D and P. The pipeerably integrally) by a tapering connecting portion, as D and, in practice. it is deemed to be preferable to arrange the expansion oint for the current to flow in the direction indicated by the arrow 1'. By reason of the described reduction of diameter of the member-D,of course this member may bemadc somewhat thinner than otherwise proper, for thus securin a relatively greater elasticity thereof for tie purposes here set forth. The features specially described in this paragraph, and involvin the Venturi construction, although disc os'ed herein is nota part of the present invention but is included in the subject matter of a se arate application, Serial N 0. 266,329, in whic said subject matter is described and claimed.

As compared with the relatively rigid cylinder B, the relatively thin pipe-end D, normally will be readilyflexed, so that, by reason of such elasticity, it will tend to conform to the packing ring S while this is being forced outwardly'against the inside ing, inwardly or outwardly, as the case may be, (underth'e usual forces, andpressures, and through the distance required) ,for bringing all partsof the circumference thereof to evenly hold the packing, material .in proper contact with the cvlindeiyand thcrchy compensate not only or some inequality in the initial distribution of the packing material, but also for the changing distribution due to the wearing away of the material more in some parts than in other parts of the circumference by long continued use. By reason of these features and qualities, the packed pipe-end operates in such a perfect manner that, in practice, no machining of the surfaces thereof will ordinarily be required, thus effecting an imp rtant saving in cost of construction and maintenance. The employment in-connection with a incmber having therein a piston-chambcr,- which member is preferably. in the form of a cylinder, as B,-of the, described flexible pipe-end, D, carrying the packing externally thereon and provided with means for separately compressing the several circumferential portions of the packing, results in a combination of means peculiarly effective for properly packing the expansion joint not only when the pipes D and P are in accurate alinement, but also when thcse pipes become shifted considerably out of line, as often happcns, for instance by the settling and shifting offoundatio'ns, I or of floors in buildings, In practice, such as a misalinement may be allowed to gra ually accumulate to the extent of one-eighth or even (in {some cases) to one-fourth of an inch per, foot of length of the pipe-end 1), without requiring a repair or resetting the pipe 'line." This very important advantage use of all tubular sleeves sliding in station ary packings, and 0 all guiding devices therefor, such as a head, or other analogous devices or means. Also, with reference to the two parts and D, I avoid :the use of any machined surface on'one part arranged to engage or to slide upon a coacting machined surface on the otherpart. the use of thoseor any such expensive guiding appliances, my present improvements provide additional advantages having,- especially for use i ing ,kinds of service,''-a widerrange 0 utility secured at a much less first cost.

Having thus described my invention, claim:-. a

1. In an expansion joint of the class described, in combination, a guide-frame member having therein a piston-chamber, means for detachably securing the guideframe and chamber to an adjacent pipe-line member, a coaeting pipe-line; member unguided asv to alinement and having one en thereof provided with a packing applied externally thereon and ada'pted to slide in the piston-chamber, and rately compressing successive circumferential portions of the packing.

- 2. In an expansion joint, of the class described, in combination, a fluid-conveying pipe-line member having therein a pistonchamber, a coacting pipe-line member uniided as to alinement and having one end thereof provided with a packing applied externally thereon and adapted to slide in the piston-chamber, and means for separately com-pressing successive circumferential portions of the packing.

3. In an expansion joint of scribed, in combination, frame member having therein a pistonchamber, means for detachably securing the Jide'frame and chamber to an adjacent pipe-line member, a coacting pipe-line member unguided as to alinement and relatively elastic diametrically as compared with the piston-chamber, and having one end thereof provided. 'with a packing applied enter nally thereon and adapted to slide in the piston-chamber, and means for separately compressing successive circumferential portions of the packing.

4. In an expansion joint of the class de- '-scribed, in combination, a rigid fluid-con- 66 veying pipe-line memberhaving therein a the class dev .and adapted to 15 a so secured while avoiding theguided head or cross.-.

Thus while avoiding" some of the more exactg Y scribed, 1n combination,

means for sepa- 1 scribed, in combination, a pipe-line mem a rigid guidenasaoco piston-chamber, and detachably securable toan adjacent pipe-line member, a coacting pipe-line member unguided as to alinement and .relatively elastic diametrically as oomparedwith said piston-chamber member, and having one end thereof provided with *a packing applied externally thereon slide in the piston-chamfor separately compressing ber, and means the successive circumferential portions of pacln'ng. v p

'5. In an expansion joint of the class-described, in combination, a fluid-conveying pipe-line member having a pisto -chamber,

a coacting pipe-line member unguided as to alinement and having one end thereof provided with a packing adapted to slide in the piston-chamber, and packin'g-regu-- lating means comprising a series of ressers operable on successive circumferential portions, respectively, of the packing.

6. In an expansion joint of the class dea rigid fluid-con- -line member having a pistonchamber, and detachably securable to an ad jacent pipe-line member, a coacting pipeline member unguided as to 'alinement and relatively elastic diametrically as compared with said piston-chamber mem r, and ing one end thereof provided with a packing adapted to slide in the piston-chamber, and packing-regulating means comprising a series of segmental pressers operable on successive circumferential portions, respec tively. of the packing,

7. In an expansion" joint of the class described, in combination, having a piston chamber, a coacting pipeline member unguided as to alinement an having one end thereof provided with a packing adapted to slide in the piston-chamber, a series of pressers arranged in a circuit and operable upon successive circumwring r p for separately actuating said pressers.

'8.'In an expansion joint of the close deber a pipeline member ferential portions oflthe packing, and means having a piston-chamber, a coacting pipeline member unguided as to alinement-an having one end thereof provided with a packing adapted to slide in the piston-chamv her, a seriesof pressers arranged in a circuit and operable upon successive circuinfer, ential portions of the packing, and comprising screws and an abutmentsring for separately; actuating said pre'ssers.

9. In'an expansion joint of the class described, in combination, a pipe-line member having a pistomchamberi a coacting .slidable ipe-line member unguided as to alinement and having one end thereof provided with a packing applied externally-thereon and adapted to slide in the'piston-chamber, a packing-regulating apparatus comprising resser-members" disposed longitudinally 45 thereof provided with a packing adapted to thereof provided with a pipe-line member, and

upon the slidable pipe-line member, and means for actuating said presser-members and carried externally on the pipe-line mem: her in position always outside of said pistonchamber.

10. In an expansion joint of the class described, in combination, a pipe-line member having a piston-chamber, a coacting 'slidable pipe-line member unguided as to alinement and having one end thereof provided with a packing applied externally thereon and adapted to slide in the piston-chamber, packing-regulating apparatus comprising resser-members arranged in a circuit and removably secured upon the slidable pipeline member. and means for separately actuating said resser-members. I 11-. In an expansion joint of the class described, in combination, a pipe-line member having a piston-chamber, a coacting slidable pipe-line member unguided as to alinement and having one end thereof provided with a packing applied-externally thereon and adapted to slide in the piston-chamber, a packing-regulating apparatus comprising resser-members disposed longitudinally of and removably secured upon the slidable presscr' actuating means arranged for separately operating saidpresser-members and located externally on the slidable pipe-line member in position always outside'of said piston-chamber. 12. In an expansion joint, in combination, a member having a piston-chamber, a"coacting pipe-line member having one end slide in the piston-chamber, aseries of prcssers iu'ranged in a circuit. and operable upon successive circumferential" portions of the packing, ers, and a packing-extractor cooperative with the pipe-line member and the pressers.

13. In an expansion joint, in combination, a member having a piston-chamber, a coacting pipe-line memberhaving one end slide in the piston-chamber, a series of pressers in a circuit and. operable upon successive circumferential portions of the packing, means for actuating said prcssers, and

I pipe-line member and .ratus comprising packing adapted to v means for actuating said press- 14. In an expansion joint, in combination,

a pipe-line member having therein a piston-' chamber, a slidable pipe-line member havmg one end thereof provided with a rim, a

packing applied externally on the slidable adapted to slide in the piston-chamber, packing-regulating appapresser-mcmbers arranged in a circuit upon the slidable pipe-line memher and cooperative with said rim, means for actuating said presser-members, anda packing-extractor comprising a series of members extending between the packing and said pipe-line member.

I 15. In an expansion joint, in combination, a member having therein a piston-chamber, a pipe having one end thereof provided with a rim, a packing applied externally on the pipe and cooperative with said rim and adapted to slide in the piston-chamber, packingregulating apparatus arrangedin a circuit upon the pipe, means for operating said apparatus, and a packing-extractor comprising a series of thin packing-engaging members each extending between the packing and said pine.

16. In an expansion joint, in combination, amember having therein a piston-chamber, a slidable pipe having one end thereof provided witha-rim. a packing applied externally on the slidable pipe and adapted to slide in the piston-chamber, packing-regulating apparatus arranged in .a circuit upon the slidable pipe, means for operating the packing-regulating apparatus, and a packingextractor comprising segmental members ar- FRANCIS n. RICHARDS.

Witnesses:

GEO. J. BAn'rELs, JOHN Mourns. 

